Quote:
Originally Posted by Carpenterman
I used to rebuild calipers. Not anymore.
It's just not worth the effort when the cost of rebuilt units is so low. The last calipers I rebuilt were well stuck. It took hours to get the pistons out. There wasn't alot of corrosion--mostly staining. I cleaned the pistons with a buffer and jeweler's rouge, and the bore with fine steel wool.
A year later, when I went to replace the pads, the caliper was once again stuck. I ended up replacing the caliper anyway.
But Brian Carleton is right. If there is any corrosion whatsoever, the caliper is not rebuildable. And I believe that corrosion is mostly why they fail. So what's the point of rebuilding?
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X2.
Just a little trick that I will never use again:
If ONE piston is stuck, firstly, do not remove the second piston.
Remove the caliper from the mounting flange but do not remove the hose. Remove the pads and clamp a block of wood against the SECOND (UNSTUCK) piston (after forcing it fully back into the bore).
Go inside the vehicle and press on the brake pedal. Use the hydraulic force from the vehicle to drive the stuck piston from the cylinder bore. If that won't do it, you're not rebuilding it anyway.